CANADIAN HOBSB DISEASE. 85 



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 lence of the disease in old worn out animals, or those 



predisposed to lung diseases, or improper medical 

 treatment. 



Pure blood stock was less seriously affected than 

 coarse animals, and the disease was much more 

 serious and fatal among the latter. 



The disease is essentially a Catarrhal Fever, of an 

 epizootic nature, the result of some atmospheric in- 

 fluence, as is shown by its sudden appearance over 

 a large extent of country, attacking with but slight 

 discrimination all kinds of horses, old and young, 

 and those in good condition as well as the poor or 

 enfeebled. 



The premonitory symptoms are : Dullness, low 

 spirits, hanging the head, easily fatigued, and sweats 

 on exercise, a staring coat, a watery discharge from 

 the nose, speedily followed by a severe hacking 

 Cough ; or the warning cough precedes all other 

 symptoms a day or two. The pulse becomes quick- 

 ened, and the mouth hot ; the nasal mucus membrane 

 becomes injected and red, pinkish, or even lead 

 color, and the ears and legs unnaturally cold. Grad- 

 ually the discharge from the nose increases, and be- 

 comes of a greenish yellow color, and as the disease 

 extends along the mucus surface, the throat becomes 

 sore, the glands involved, and the swallowing imped- 

 ed painful and difficult, and as the bronchia becomes 

 involved, the respiration is increased in frequency ^ 

 and in some cases becomes labored and difficult. 



In the progress of the disease, the glands may 



